One problem I noticed when people talk about GTA V and more specifically GTA Online is that there's pretty much no other interesting cities to go and live in. What I did was to try and edit the map to add other locations as well as to improve existing ones.

For example, Grapeseed and Chumash were improved by expanding and adding new land (Grapeseed getting a more urban center, while Chumash got more land further into the sea). I added 2 new sections for Los Santos, a valley to the north behind Vinewood (Great Chaparral Valley), and 3 new neighborhoods where much of the oil field once stood, both made to resemble the real life locations of San Fernando Valley and Long Beach respectively. Finally, I added 2 new towns based on Palmdale/Lancaster (Challenger), and Santa Barbara (San Murillo).

Is it a good map? Hell no, far from it. It has plenty of flaws and cant really be added well without heavily changing some terrain. But It's my attempt nonetheless and hopefully it got my vision clear.